EP0784242A3 - Sheet feeding apparatus - Google Patents

Sheet feeding apparatus Download PDF

Info

Publication number
EP0784242A3
EP0784242A3 EP97300142A EP97300142A EP0784242A3 EP 0784242 A3 EP0784242 A3 EP 0784242A3 EP 97300142 A EP97300142 A EP 97300142A EP 97300142 A EP97300142 A EP 97300142A EP 0784242 A3 EP0784242 A3 EP 0784242A3
Authority
EP
European Patent Office
Prior art keywords
drawer
sensor
feedhead
sheets
stack height
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97300142A
Other languages
German (de)
French (fr)
Other versions
EP0784242B1 (en
EP0784242A2 (en
Inventor
Ermanno C. Petocchi
Janice S. Brooks
James R. Bryce
Bruce J. Direnzo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/583,829 external-priority patent/US5653434A/en
Priority claimed from US08/583,830 external-priority patent/US5842694A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of EP0784242A2 publication Critical patent/EP0784242A2/en
Publication of EP0784242A3 publication Critical patent/EP0784242A3/en
Application granted granted Critical
Publication of EP0784242B1 publication Critical patent/EP0784242B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6502—Supplying of sheet copy material; Cassettes therefor
    • G03G15/6511—Feeding devices for picking up or separation of copy sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/14—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising positively-acting mechanical devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/15—Height, e.g. of stack
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00379—Copy medium holder
    • G03G2215/00383—Cassette
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00396—Pick-up device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00729—Detection of physical properties of sheet amount in input tray

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

A stack height control assembly that is remote from the feedhead (50). A floating coupler and sensor flag arrangement (150) is mounted so that it is engaged with a paper supply drawer as the drawer is moved into an operative position. The feedhead (50) acts as the stack height sensor and through a mechanical engagement with the sensor, which is removed and remote from the supply drawer, signals as the stack (54) is depleted and the elevator mechanism should raise the stack (54). This control scheme removes complex electrical connectors from the drawer assembly and allows a wide range of substrates to be fed from the paper supply drawer By allowing the sensor/coupler arrangement to float so as to align with the drawer, the need for extremely tight manufacturing and assembly tolerances with respect to the drawer/sensor arrangement is also obviated.
As a result of incorporating the stack height sensor into the feedhead, several advantages are realized. There is no additional drag imparted to the sheets as the result of a sensing arm or other sensing member. This also reduces the possibility of skewing the sheets with an additional sensing member. The feedhead, due to the normal force required to acquire the sheets also provides an accurate measurement of stack height. The normal force of the feedhead also eliminates and inaccurracies that could be caused by curled sheets in a feed tray. The stack height is also measured "on the fly" as the sheets are being acquired and fed, thus providing an efficient stack height sensing scheme.
EP97300142A 1996-01-11 1997-01-10 Method of feeding sheets Expired - Lifetime EP0784242B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US583829 1996-01-11
US08/583,829 US5653434A (en) 1996-01-11 1996-01-11 Stack height control remote from feedhead
US583830 1996-01-11
US08/583,830 US5842694A (en) 1996-01-11 1996-01-11 Stack height control with height sensing feedhead

Publications (3)

Publication Number Publication Date
EP0784242A2 EP0784242A2 (en) 1997-07-16
EP0784242A3 true EP0784242A3 (en) 1998-04-15
EP0784242B1 EP0784242B1 (en) 2003-09-03

Family

ID=27078913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97300142A Expired - Lifetime EP0784242B1 (en) 1996-01-11 1997-01-10 Method of feeding sheets

Country Status (2)

Country Link
EP (1) EP0784242B1 (en)
DE (1) DE69724481T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5331398B2 (en) * 2007-07-30 2013-10-30 京セラドキュメントソリューションズ株式会社 Paper feeding device and image forming apparatus provided with paper feeding device
JP2009062158A (en) * 2007-09-07 2009-03-26 Canon Inc Sheet feeder and image forming apparatus having the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981497A (en) * 1975-06-23 1976-09-21 International Business Machines Corporation Automatic document alignment method and apparatus for document feed equipment
CH616388A5 (en) * 1977-04-18 1980-03-31 Kurt Ruenzi Separating device for paper sheets
JPH01267233A (en) * 1988-04-19 1989-10-25 Toshiba Corp Image forming device
EP0357012A2 (en) * 1988-09-01 1990-03-07 Konica Corporation Recording sheet feeding apparatus
EP0555091A1 (en) * 1992-02-06 1993-08-11 Fujitsu Limited Paper feeders

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589645A (en) 1985-10-03 1986-05-20 Xerox Corporation Document set separator and stack height sensor
US5033731A (en) 1990-03-12 1991-07-23 Xerox Corporation Dual mode stack height and sheet delivery detector
JP2958395B2 (en) * 1995-09-12 1999-10-06 富士ゼロックス株式会社 Paper feeder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981497A (en) * 1975-06-23 1976-09-21 International Business Machines Corporation Automatic document alignment method and apparatus for document feed equipment
CH616388A5 (en) * 1977-04-18 1980-03-31 Kurt Ruenzi Separating device for paper sheets
JPH01267233A (en) * 1988-04-19 1989-10-25 Toshiba Corp Image forming device
EP0357012A2 (en) * 1988-09-01 1990-03-07 Konica Corporation Recording sheet feeding apparatus
EP0555091A1 (en) * 1992-02-06 1993-08-11 Fujitsu Limited Paper feeders

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 029 (M - 922) 19 January 1990 (1990-01-19) *

Also Published As

Publication number Publication date
DE69724481D1 (en) 2003-10-09
DE69724481T2 (en) 2004-04-01
EP0784242B1 (en) 2003-09-03
EP0784242A2 (en) 1997-07-16

Similar Documents

Publication Publication Date Title
EP0781720A3 (en) Sheet feeder having improved sheet separation regardless of rigidity and size of sheet
US7000914B2 (en) Imaging methods and apparatus
EP0816800A3 (en) Sheet thickness sensing apparatus
EP0945377A3 (en) Sheet feed device for leaflet folder
EP1306799A3 (en) Modular card processing system
EP0728589A3 (en) Recording apparatus
EP0970909A3 (en) Stack comprising V-Z folded sheets
US5507478A (en) Printing media status sensing
EP1914086A3 (en) A sheet feeding unit
US6032946A (en) Document feeder
EP1063189A3 (en) Device for detecting remaining quantity of rolled papers
EP1842812A3 (en) Sheet feeding apparatus and image forming apparatus
US5228792A (en) Printing device
EP0784242A3 (en) Sheet feeding apparatus
US7588244B2 (en) Sheet feeder with optical sensor
DE69801380T2 (en) Device for selectively feeding sheets from two magazines in an office machine
EP0758176A3 (en) Automatic sheet conveying mechanism
EP0656263A3 (en) Printer with paper feed mechanism
CN106315267B (en) A kind of paper system of printing machine
US20040195755A1 (en) Sheet feeder avoiding sheet sag
EP0949170A3 (en) Sheet supply system
EP0950531A3 (en) Image forming apparatus
EP1193198A3 (en) Paper feeding apparatus
CN201970585U (en) Novel paper jamming prevention miniprinter
EP2014588A3 (en) Sheet feeder and image forming apparatus

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19981015

17Q First examination report despatched

Effective date: 20010730

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RTI1 Title (correction)

Free format text: METHOD OF FEEDING SHEETS

RTI1 Title (correction)

Free format text: METHOD OF FEEDING SHEETS

RTI1 Title (correction)

Free format text: METHOD OF FEEDING SHEETS

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69724481

Country of ref document: DE

Date of ref document: 20031009

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040604

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20041130

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20121224

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20130305

Year of fee payment: 17

Ref country code: DE

Payment date: 20121226

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69724481

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140930

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69724481

Country of ref document: DE

Effective date: 20140801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140110